Certainly if they had understood, as admitted by Cameron in recent days, that the campaign will last for at least 3 years with no clear goal. The general public just have no idea on the scale of this task and think a few bombing runs will sort this lot out. But the fact is they are more brutal...
Saw that the poll on the Argus is also similar to the poll here, i.e. around 60% are against air strikes where 5 days ago YouGov poles were showing 50 for, 30 against and 20 undecided. It would be interesting to see a poll done tomorrow morning.
Not that it will change much, foregone conclusion...
I expect from YouGov.
https://yougov.co.uk/news/2015/11/25/strong-and-continued-support-raf-air-strikes-syria/
Although that was a few days ago and public opinion seems to have shifted since then.